Summary: The Journal of Neuroscience, December 1994, 14(12): 7381-7392
Transparent Motion Perception as Detection of Unbalanced Motion
Signals. III. Modeling
Ning Qian,a
Richard A. Andersen, and Edward H. Adelson
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
In the preceding two companion articles we studied the
conditions under which transparent motion perception occurs
through psychophysical experiments, and investigated the
underlining neural mechanisms through physiological
recordings. The main finding of our perceptual experiments was
that whenever a display has finely balanced motion signals in all
local areas, it is perceptually nontransparent, and that
transparent displays always contain motion signals in different
directions that are either spatially unbalanced, or unbalanced in
their disparity or spatial frequency contents. In the physiological
experiments, we found two stages in the processing of
transparent stimuli. The first stage is located primarily in area V1.
At this stage motion measurements are made and V1 cells
respond well to both the balanced, nontransparent stimuli and